I had heard the name Udemy a while back when MOOCs were just starting to get a lot of media attention. But when I looked at the site, it didn’t seems to have much content that was interesting for me. Now it seems that they have really taken off. There are quite a lot of courses offered there now, even an introduction to Design Thinking course (https://www.udemy.com/design-thinking-innovate-in-style/) which is for free.